These envelopes are not see-through at all so they are perfect for mailing potentially sensitive information. And the best part is -- no licking! The self-adhesive closure is easy to use seals nicely and you don't get glue on your tongue. And they were a very reasonable price.
This batch of envelopes do not stick well. I have to use scotch tape to insure that the envelope will not open when in the mail. Disappointed in this purchase.